SF2446E

Overview

The RFMi SF2446E is a general-purpose Surface Acoustic Wave (SAW) bandpass filter designed for RF signal conditioning. It operates at a center frequency of 435 MHz with a typical 3 dB bandwidth of 23 MHz, covering a range from 430 to 440 MHz. The component features a low insertion loss of 1.9 dB and supports a maximum rated voltage of 10 V. It maintains a standard system impedance of 50 Ohms and is housed in a compact 6-SMD, no-lead package suitable for surface mount applications.

Feature Summary

• Surface Acoustic Wave technology for efficient RF filtering
• Low insertion loss characteristic for signal integrity
• Compact 6-SMD no-lead package design

Applications

• Receiver converters for amateur radio bands
• Transverters for the 70cm band
• General purpose RF signal conditioning

Procurement Notes

Verify the specific manufacturer designation, as the component is associated with both Akoustis and RFMi branding in public records. Confirm the exact package type and electrical tolerances against the official datasheet before integration. Ensure compliance with RoHS standards if required by your manufacturing process. Cross-reference the Mouser number 198-SF2446E for accurate sourcing details.

Selection Notes

Select this component when a narrow bandpass filter centered at 435 MHz is required for 50 Ohm systems. The 23 MHz bandwidth makes it suitable for specific amateur radio segments. Consider the 1.9 dB insertion loss impact on overall system noise figure. The SMD form factor aids in automated assembly processes for high-volume production runs.

Part Context

This SAW filter belongs to the family of RF components used in communication equipment. It serves as a critical element for frequency selection in transceivers operating in the UHF spectrum. The device replaces discrete LC networks with a more stable and compact solution for fixed-frequency applications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing circuit layouts when considering alternative SAW filters with similar center frequencies and bandwidths.